Porous adjustable prefabricated box girder steel formwork transfer lifting appliance device

Abstract

The utility model relates to the technical field of bridge construction, in particular to a porous adjustable prefabricated box girder steel formwork transfer lifting appliance device which comprises a vertical frame, a supporting cross frame in a cantilever state is fixed to the inner side of the top of the vertical frame, and a plurality of lifting holes are formed in the front side and the rear side of the supporting cross frame. A pair of inner bracket transverse pipes are fixed to the inner side of the lower portion of the vertical frame, and inner bracket hooks capable of being transversely adjusted in a telescopic mode are arranged on the inner bracket transverse pipes. A supporting bottom rod is longitudinally fixed to the lower end of the vertical frame, and longitudinal rods capable of being telescopically adjusted are arranged at the front end and the rear end of the supporting bottom rod correspondingly. The device is conveniently used for mounting and dismounting the prefabricated box girder steel formwork, and the problems that in the prior art, hanging point stress is concentrated, adaptability is poor, and stability is insufficient are solved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a multi-hole adjustable precast box girder steel formwork transfer hoisting device. Background Technology

[0002] In bridge engineering, the hoisting of precast box girder steel formwork must balance efficiency and safety. Traditional hoisting equipment often uses fixed lifting points, which typically presents the following problems:

[0003] 1. Single lifting point: Stress is concentrated on a few lifting lugs, which can easily lead to formwork deformation or weld cracking;

[0004] 2. Poor adaptability: It cannot adapt to different sizes of templates, requiring frequent changes of lifting equipment and increasing construction costs;

[0005] 3. Insufficient stability: The formwork is prone to swaying during hoisting, posing safety hazards.

[0006] Therefore, there is an urgent need for a new type of lifting device that combines multi-point force bearing, adjustability, and stability. Utility Model Content

[0007] The purpose of this utility model is to provide a multi-hole adjustable precast box girder steel formwork transfer hoisting device. This device is convenient for the installation and dismantling of precast box girder steel formwork and solves the problems of stress concentration at the hoisting points, poor adaptability and insufficient stability in the prior art.

[0008] The technical solution of this utility model is as follows: a multi-hole adjustable precast box girder steel formwork transfer hoisting device, including a vertical frame, a cantilevered support crossbar fixed on the top inner side of the vertical frame, and multiple hoisting holes provided on the front and rear sides of the support crossbar; a pair of inner bracket cross tubes fixed on the lower inner side of the vertical frame, and inner bracket hooks that can be adjusted laterally on the inner bracket cross tubes; a support base rod fixed longitudinally at the lower end of the vertical frame, and longitudinal rods that can be adjusted in telescopically on both the front and rear ends of the support base rod.

[0009] Furthermore, the front and rear sides of the supporting crossbeam are both fixed with hanging plates, and the hanging plates are provided with multiple lifting holes spaced apart along the horizontal direction.

[0010] Furthermore, the inner bracket hook is fixedly connected to one end of a crossbar, the crossbar is inserted laterally into the inner bracket horizontal tube, and a locking bolt for locking the crossbar is screwed onto the inner bracket horizontal tube.

[0011] Furthermore, the inner bracket hook includes a fixing plate fixed to the front and rear sides of one end of the crossbar, and the upper end of the fixing plate extends upward and protrudes from the upper surface of the crossbar to form a hook portion.

[0012] Furthermore, a stiffening plate is welded at the corner between the lower side of the inner bracket horizontal tube and the vertical frame.

[0013] Furthermore, the supporting base rod is tubular, the longitudinal rod is inserted longitudinally into the supporting base rod, and the outer side of the supporting base rod is screwed with fastening bolts for locking the longitudinal rod.

[0014] Furthermore, a pair of limiting blocks are provided on the upper side of the supporting base rod, which are fixedly connected to the lower inner side of the vertical frame.

[0015] Furthermore, a U-shaped hook is fixed to the upper part of the vertical frame.

[0016] Furthermore, the vertical frame, supporting crossbar, and supporting base are all made of rectangular steel pipes and welded together as a whole.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This device achieves multi-point force distribution through a lifting plate with lifting holes, avoiding localized stress concentration; adjustable longitudinal bars cooperate with the supporting base bars, and adjustable inner bracket hooks adapt to templates of different sizes; the supporting crossbeam and limiting blocks provide double restraint, suppressing lifting sway. This effectively solves the problems of stress concentration at lifting points, poor adaptability, and insufficient stability in existing technologies.

[0019] 2. This device is convenient for the installation and dismantling of precast box girder steel formwork, and is especially suitable for the efficient and safe hoisting of box girder formwork of different sizes and shapes.

[0020] 3. The internal bracket hook of this device can quickly lock the template, enabling rapid assembly and disassembly and improving construction efficiency. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of the multi-hole adjustable precast box girder steel formwork installation and dismantling lifting device of this utility model;

[0022] Figure 2 For the present utility model Figure 1 The left view;

[0023] Figure 3 This is a diagram illustrating the effect of using this utility model;

[0024] In the diagram: 1. Template; 2. Beam and slab; 10. Vertical frame; 11. Stiffening plate; 20. Support crossbeam; 30. Hanging plate; 31. Lifting hole; 40. U-shaped hook; 50. Inner bracket horizontal tube; 60. Inner bracket hook; 61. Horizontal bar; 62. Locking bolt; 63. Fixing plate; 71. Fastening bolt; 70. Support base bar; 80. Longitudinal bar; 90. Limiting block. Detailed Implementation

[0025] To make the above-mentioned features and advantages of this utility model more easily understood, specific embodiments are described below in conjunction with the accompanying drawings, but this utility model is not limited thereto.

[0026] refer to Figures 1 to 3

[0027] A multi-hole adjustable precast box girder steel formwork transfer hoisting device includes a vertically mounted frame 10. A cantilevered support crossbeam 20 is fixed to the inner top of the frame, and multiple lifting holes 31 are provided on both the front and rear sides of the support crossbeam. A U-shaped hook 40 is fixed to the outer upper part of the frame, allowing the hook to engage with the lifting holes to lift the device and prevent tilting. A pair of inner bracket cross tubes 50 are fixed to the inner lower part of the frame, and each cross tube has a laterally adjustable inner bracket hook 60 to hook onto the beam slab 2 in the width direction of the formwork 1. A support base rod 70 is longitudinally fixed to the lower end of the frame, and both the front and rear ends of the support base rod have adjustable longitudinal bars 80 to adjust the length according to the width of the formwork.

[0028] In this embodiment, the vertical frame, the supporting crossbeam, and the supporting base rod work together to form the external supporting frame.

[0029] In this embodiment, the vertical frame may include two vertical tubes, with a longitudinal tube fixed between the upper ends of the two vertical tubes. The lower inner sides of the two vertical tubes are connected to a supporting base rod to form a rectangular structure. The two ends of the U-shaped hook are welded and fixed between the upper parts of the two vertical tubes.

[0030] In this embodiment, the support crossbeam is a horizontal rectangular structure, and hanging plates 30 are fixed on both the front and rear sides of the support crossbeam. Multiple lifting holes 31 are spaced apart along the horizontal direction on the hanging plates to accommodate different lifting point requirements.

[0031] In this embodiment, the inner bracket hook is fixedly connected to one end of a crossbar 61. The crossbar passes laterally into the inner bracket horizontal tube. Several locking bolts 62 for locking the crossbar are screwed onto the inner bracket horizontal tube, thereby locking the crossbar after length adjustment by locking the crossbar.

[0032] In this embodiment, the inner bracket hook includes a fixing plate 63 fixed to the front and rear sides of one end of the crossbar. The upper end of the fixing plate extends upward and protrudes from the upper surface of the crossbar to form a hook portion, so as to hook the beam plate in the width direction of the template through the hook portion.

[0033] In this embodiment, a stiffening plate 11 is welded to the corner between the lower side of the inner bracket horizontal tube and the vertical frame to enhance the overall rigidity. The inner bracket horizontal tube is welded and fixed to the lower inner side of the two vertical tubes.

[0034] In this embodiment, the supporting base rod is tubular, and the longitudinal rod is inserted longitudinally into the supporting base rod. A fastening bolt 71 for locking the longitudinal rod is screwed onto the outer side of the supporting base rod, thereby locking the longitudinal rod after length adjustment. The maximum adjustment range of the longitudinal rod is 500mm, suitable for templates with widths of 400mm-1200mm.

[0035] In this embodiment, a pair of limiting blocks 90 are provided on the upper side of the supporting base rod and are fixedly connected to the lower inner side of the vertical frame. The limiting blocks limit the lower side of the template to prevent tilting.

[0036] In this embodiment, the vertical frame, supporting crossbeam, supporting base rod, and inner bracket cross tube are all made of rectangular steel pipes and welded together as one unit.

[0037] Installation and usage instructions:

[0038] (1) Assemble the external support frame: Weld the vertical frame 10, the support crossbar 20, and the support bottom rod 70 into an external support frame, and weld stiffening and fixing plates at the nodes.

[0039] (2) Install the hanging plate 30: Make several Φ30mm hoisting holes evenly on the hanging plate with a spacing of 200mm, and weld the hanging plate on the front and back sides of the supporting cross frame 20.

[0040] (3) Adjust the inner bracket hook 60: According to the width of template 1, slide the horizontal bar 61 to the appropriate position and fix it to the inner bracket horizontal tube 50 by locking bolt 62.

[0041] (4) Fixing the template: Place the template 1 inside the outer support frame, so that the beam 2 in the width direction of the template 1 is placed on the inner bracket hook 60; adjust the length of the longitudinal bar 80 and lock it by tightening the bolt.

[0042] (5) Lifting operation: Select the lifting hole 31 on the lifting plate 30 according to the center of gravity of the template 1, and connect the U-shaped hook with steel wire to the lifting hook of the lifting equipment and lift vertically. During lifting, the inner bracket hook restricts the lateral displacement of the template, and the support crossbeam 20 and the support base rod 70 cooperate to limit the template 1 and prevent it from overturning.

[0043] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting or welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0044] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this utility model to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0045] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0046] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A multi-hole adjustable precast box girder steel form transfer hoist device, characterized in that, The system includes a vertical frame, on the inner top of which a cantilevered support crossbeam is fixed, with multiple lifting holes on both the front and rear sides of the support crossbeam; a pair of inner bracket cross tubes are fixed to the inner lower part of the vertical frame, with inner bracket hooks that can be adjusted laterally on the inner bracket cross tubes; and a support base rod is fixed longitudinally at the lower end of the vertical frame, with adjustable longitudinal bars at both the front and rear ends of the support base rod.

2. The multi-cell adjustable precast box beam steel form launching device of claim 1, wherein, The front and rear sides of the supporting crossbeam are fixed with hanging plates, and the hanging plates are provided with multiple lifting holes spaced apart along the horizontal direction.

3. The multi-cell adjustable precast box girder steel form launching trolley apparatus according to claim 1 or 2, wherein, The inner bracket hook is fixedly connected to one end of a crossbar, the crossbar is inserted laterally into the inner bracket horizontal tube, and a locking bolt for locking the crossbar is screwed onto the inner bracket horizontal tube.

4. The multi-cell adjustable precast box beam steel form launching assembly as claimed in claim 3, wherein, The inner bracket hook includes a fixing plate fixed to the front and rear sides of one end of the crossbar, and the upper end of the fixing plate extends upward and protrudes from the upper surface of the crossbar to form a hook.

5. The multi-cell adjustable precast box beam steel form launching device as claimed in claim 1, 2 or 4, wherein, A stiffening plate is welded at the corner between the lower side of the inner bracket horizontal tube and the vertical frame.

6. The multi-cell adjustable precast box beam steel form launching device as claimed in claim 1, 2 or 4, wherein, The supporting base rod is tubular, and the longitudinal rod is inserted into the supporting base rod longitudinally. The outer side of the supporting base rod is screwed with fastening bolts for locking the longitudinal rod.

7. The multi-cell adjustable precast box beam steel form launching device as claimed in claim 1, 2 or 4, wherein, The upper side of the support base rod is provided with a pair of limiting blocks that are fixedly connected to the lower inner side of the vertical frame.

8. The multi-cell adjustable precast box beam steel form launching assembly as claimed in claim 1, wherein, A U-shaped hook is fixed to the upper part of the vertical frame.

9. The multi-cell adjustable precast box beam steel form launching assembly as claimed in claim 1, wherein, The vertical frame, supporting crossbar, and supporting base are all made of rectangular steel pipes and welded together as one unit.

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